bug: Potential regression with Bucket Creation in 0.32.3

[No9]

Hi All
Thanks for building this awesome library!!
If you have a minute it would be great to get your opinion on this issue.

Describe the bug
We have upgraded our application from 0.31 to 0.32.3 and there seems to be an issue with the creation of bucket objects when using AWS. It seems to work in other s3 compatible storage but AWS is the issue.
IBM/core-dump-handler#126

To Reproduce
This is the bucket creation code that used to work but now fails
https://github.com/IBM/core-dump-handler/blob/ac737112fb6d2ba046942befb226c1f645f56d33/core-dump-agent/src/main.rs#L353-L394
Apart from the library change nothing else has changed with that code.

Expected behavior
Creation of bucket object should work.

Environment

• Rust version: 1.66
• lib version 0.32.3

Additional context
We are going to downgrade the version of the library to the last working version 0.31 to make sure the issue we have identified the cause and report back

[No9]

Just to update - We tested with a downgrade to 0.31.0 of rust-s3 and it seems to work as expected.
IBM/core-dump-handler#126 (comment)
If I get time I will try and understand where this happened in this diff.
v0.31.0...v0.32.0

[durch]

@No9 very interesting, I don't think I've touched bucket creation code in a long while, did you maybe manage to collect more details?